b3882d1babc41e8287e1b0abd0b1914c5554429e465af3aec346e6a35711495e

Analysis

max time kernel
99s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 05:11

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General

Target

2979afc8b324a96d936fedc9909b56f1.dll
Size

36KB
MD5

2979afc8b324a96d936fedc9909b56f1
SHA1

c74df15d53b87890c143d9b8ffd48e3139838968
SHA256

b3882d1babc41e8287e1b0abd0b1914c5554429e465af3aec346e6a35711495e
SHA512

3b5abe6e307907545239ca65f968c6a407f7282304a3e1ab61f809842dc6b9e678b0ebea9edc420848aa617071fd4d7c3550a36418964a7b3158595741e268ca
SSDEEP

768:DOBpuLcRbJ1N/ERvvgsNyIhxydgG567yxdrEJM:DOBgwrN/E2s8TWVerE+

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
5028	rundll32.exe
5028	rundll32.exe
4664	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\ljJYRHWM.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ljJYRHWM.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\ljJYRHWM.dll	rundll32.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{6D794CB4-C7CD-4c6f-BFDC-9B77AFBDC02C}\InprocServer32\ = "C:\\Windows\\SysWow64\\ljJYRHWM.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5028	rundll32.exe
5028	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe
4664	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
5028	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5028	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5028	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 5028	4064	rundll32.exe	14
PID 4064 wrote to memory of 5028	4064	rundll32.exe	14
PID 4064 wrote to memory of 5028	4064	rundll32.exe	14
PID 5028 wrote to memory of 612	5028	rundll32.exe	4
PID 5028 wrote to memory of 4664	5028	rundll32.exe	101
PID 5028 wrote to memory of 4664	5028	rundll32.exe	101
PID 5028 wrote to memory of 4664	5028	rundll32.exe	101

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2979afc8b324a96d936fedc9909b56f1.dll,#1
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\ljJYRHWM.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:4664

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2979afc8b324a96d936fedc9909b56f1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4064

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\ljJYRHWM.dll

Filesize
36KB

MD5
2979afc8b324a96d936fedc9909b56f1

SHA1
c74df15d53b87890c143d9b8ffd48e3139838968

SHA256
b3882d1babc41e8287e1b0abd0b1914c5554429e465af3aec346e6a35711495e

SHA512
3b5abe6e307907545239ca65f968c6a407f7282304a3e1ab61f809842dc6b9e678b0ebea9edc420848aa617071fd4d7c3550a36418964a7b3158595741e268ca

Download Submit
memory/4664-19-0x0000000000D80000-0x0000000000D85000-memory.dmp

Filesize
20KB

Download
memory/4664-20-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/4664-18-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/4664-21-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5028-0-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5028-1-0x0000000000DC0000-0x0000000000DC5000-memory.dmp

Filesize
20KB

Download
memory/5028-10-0x0000000001410000-0x0000000001415000-memory.dmp

Filesize
20KB

Download
memory/5028-9-0x00000000013F0000-0x0000000001405000-memory.dmp

Filesize
84KB

Download
memory/5028-2-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5028-13-0x0000000000DC0000-0x0000000000DC5000-memory.dmp

Filesize
20KB

Download